4-(Difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-6-acetonitrile
2-Hydroxy-6-iodo-5-(trifluoromethoxy)pyridine-3-acetic acid
3-(Difluoromethyl)-5-hydroxy-6-(trifluoromethoxy)pyridine-2-acetonitrile
2-(Difluoromethyl)-4-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid